/*
 * Copyright (C) 2013 Daniel Wasilew <daniel.wasilew@codeminer.org>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.codeminer.parts.server.permissions;

import java.util.Set;
import org.codeminer.parts.server.users.User;

/**
 *
 * @author Daniel Wasilew <daniel.wasilew@codeminer.org>
 */
public interface PermissionManager {
    Set<Permission> getPermissions(User user);
    void setPermissions(User user, Set<Permission> permission);
    void removePermission(User user, Permission permission);
    void addPermission(User user, Permission permission);
    
    /**
     * Returns a Set of Permissions <b>not</b> granted for the supplied user.
     * If the returned Set is empty the user has all permissiones requested.
     * @param user - the user
     * @param requestedPermissions - permissions which are needed
     * @return a Set of not granted permissions or empty if all are granted to this user
     */
    Set<Permission> granted(User user, Set<Permission> requestedPermissions);
}
